Prosečne GPS koordinate za poštanski broj 407-831: 37.578, 126.889

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Spisak gradova:
>> Hyoseong 2(i)-dong/효성2동 407-831, Incheon/인천, Gyeyang-gu/계양구, 239-242/239-242, GPS koordinate: 37.57772,126.88942
>> Hyoseong 2(i)-dong/효성2동 407-831, Incheon/인천, Gyeyang-gu/계양구, 271-273/271-273, GPS koordinate: 37.57763,126.88933
>> Hyoseong 2(i)-dong/효성2동 407-831, Incheon/인천, Gyeyang-gu/계양구, 301-499/301-499, GPS koordinate: 37.57765,126.88935